diff options
author | Guido Guenther <agx@sigxcpu.org> | 2006-11-18 23:48:07 +0100 |
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committer | Guido Guenther <agx@bogon.sigxcpu.org> | 2006-11-18 23:48:07 +0100 |
commit | d1e063beb43e595680c65e3804d1f8ddff53373b (patch) | |
tree | f7256dfe1b807920270ec5113df6f6e4abf1ed0f /e2fslib/ext_attr.c |
Imported Debian version 0.3.8.80.3.8.8
Diffstat (limited to 'e2fslib/ext_attr.c')
-rw-r--r-- | e2fslib/ext_attr.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/e2fslib/ext_attr.c b/e2fslib/ext_attr.c new file mode 100644 index 0000000..3a281e8 --- /dev/null +++ b/e2fslib/ext_attr.c @@ -0,0 +1,100 @@ +/* + * ext_attr.c --- extended attribute blocks + * + * Copyright (C) Andreas Gruenbacher, <a.gruenbacher@computer.org> + * + * %Begin-Header% + * This file may be redistributed under the terms of the GNU Public + * License. + * %End-Header% + */ + +#include <stdio.h> +#if HAVE_UNISTD_H +#include <unistd.h> +#endif +#include <string.h> +#include <time.h> + +#include "ext2_fs.h" +#include "ext2_ext_attr.h" + +#include "ext2fs.h" + +#ifdef EXT2FS_ENABLE_SWAPFS +void ext2fs_swap_ext_attr(ext2_filsys fs, char *to, char *from) +{ + struct ext2_ext_attr_header *from_header = + (struct ext2_ext_attr_header *)from; + struct ext2_ext_attr_header *to_header = + (struct ext2_ext_attr_header *)to; + struct ext2_ext_attr_entry *from_entry, *to_entry; + char *from_end = (char *)from_header + fs->blocksize; + int n; + + if (to_header != from_header) + memcpy(to_header, from_header, fs->blocksize); + + to_header->h_magic = ext2fs_swab32(from_header->h_magic); + to_header->h_blocks = ext2fs_swab32(from_header->h_blocks); + to_header->h_refcount = ext2fs_swab32(from_header->h_refcount); + for (n=0; n<4; n++) + to_header->h_reserved[n] = + ext2fs_swab32(from_header->h_reserved[n]); + + from_entry = (struct ext2_ext_attr_entry *)(from_header+1); + to_entry = (struct ext2_ext_attr_entry *)(to_header+1); + while ((char *)from_entry < from_end && *(__u32 *)from_entry) { + to_entry->e_value_offs = + ext2fs_swab16(from_entry->e_value_offs); + to_entry->e_value_block = + ext2fs_swab32(from_entry->e_value_block); + to_entry->e_value_size = + ext2fs_swab32(from_entry->e_value_size); + from_entry = EXT2_EXT_ATTR_NEXT(from_entry); + to_entry = EXT2_EXT_ATTR_NEXT(to_entry); + } +} +#endif + +errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf) +{ + errcode_t retval; + struct ext2_ext_attr_entry *entry; + + retval = io_channel_read_blk(fs->io, block, 1, buf); + if (retval) + return retval; +#ifdef EXT2FS_ENABLE_SWAPFS + if ((fs->flags & (EXT2_FLAG_SWAP_BYTES| + EXT2_FLAG_SWAP_BYTES_READ)) != 0) + ext2fs_swap_ext_attr(fs, buf, buf); +#endif + return 0; +} + +errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, void *inbuf) +{ + errcode_t retval; + char *p, *end, *write_buf; + char *buf = NULL; + struct ext2_dir_entry *dirent; + +#ifdef EXT2FS_ENABLE_SWAPFS + if ((fs->flags & EXT2_FLAG_SWAP_BYTES) || + (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)) { + retval = ext2fs_get_mem(fs->blocksize, (void **) &buf); + if (retval) + return retval; + write_buf = buf; + ext2fs_swap_ext_attr(fs, buf, inbuf); + } else +#endif + write_buf = (char *) inbuf; + retval = io_channel_write_blk(fs->io, block, 1, write_buf); + if (buf) + ext2fs_free_mem((void **) &buf); + if (!retval) + ext2fs_mark_changed(fs); + return retval; +} |